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CVE-2026-11653 is a high-severity vulnerability in the Extensions component of Google Chrome prior to 149.0.7827.103. The issue is described as an inappropriate implementation / insufficient validation of untrusted input in Extensions that allowed a remote attacker, after first compromising the renderer process, to bypass Chrome site isolation using a crafted HTML page. The flaw weakens browser-enforced isolation boundaries between sites and origins. Based on the provided content, exploitation requires chaining this bug after renderer compromise rather than direct unauthenticated code execution from the vulnerability alone.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity vulnerability affecting Chrome Extensions, mentioned as part of the broader June 2026 Chrome security update.
A high-severity insufficient validation of untrusted input vulnerability in Chrome Extensions.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.